fastnbt crate

Documentation: docs.rs

Fast (or trying to be!) deserializer and parser for Minecraft: Java Edition's NBT format.

Includes

• a serde based deserializer for NBT for deserialization.
• a lower level parser using the Read trait.

The derserializer allows you to avoid allocations where possible. Strings can be deserialized to &'a str where 'a is the lifetime of the data being deserialized. This can also be done for lists of any integral type into &'a [u8]. The same applies to the Array types in NBT.

See the documentation for more information.

toml [dependencies] fastnbt = "0.18"

Comparison to other NBT crates

There are other crates for NBT out there, this tries to give an honest comparison to them.

| Feature | fastnbt | Hematite nbt | note | | ------- | --------- | -------------- | ---- | | Benchmark world render* | 23.8+-0.7s | 31.6+-0.9s | making fastnbt 33% faster in this test | | Deserialization | yes | yes | | | Serialization | no | yes | | | Value-like type | yes | yes | | | Long Array (MC 1.12+) | yes | yes | | | Minecraft specialized unicode | no** | yes | | | Deserialize from reader | no | yes | | | WASM compatible | yes | unknown | |

*see 01-11-2020.md in benchmarks directory

**intended feature

Road to 1.0

Some things I want to finish off properly for 1.0

• Better error handling, eg non-exhaustive to make it easier to introduce new error types in future.
• Establish policy about minimum Rust versions.